Suppose Xiaoming has 8X yuan and Xiao Qiang has 5x yuan, then according to the meaning of the question, 8x-30=5x- 15.

Solve the equation, 8x-5x=- 15-30

3x= 15

x=5

Therefore, Xiaoming's original 8*x=40 yuan and Xiao Qiang's original 5*x= 15 yuan.